Shuttle-actuating mechanism for sewing-machines.



PAENTED APR. 19, 1904. l

APPLIUATION FILED PEB. l, 1904.

No 110ML.'

2 SHEETS-SHEET 1` f Kmdlmm@ PATENTED APR. 19, 1904.

G. L. GolwoRml SHUTTLE AGTUATING MEGHANISMEOR SEWING MAGHINBS.

APPLICATION FILED FEB. 1' 1904.

2 SHEETS-SHEET 2.

N0 MODEL.

l l GEORGE L. 'CORCORAN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO CHAMPION Patented April 19, 1904` PATENT OEETEE,

SHOE MACHINERY COMPANY, OF ST. LOUIS, MISSOURI, Av CORPORA- TION OF MISSOURI.

SHUTTLE-ACTUATING NiECHANlSNl FOR SEWpING-MAGHINES.

SPECIFICATION forming part of Letters Patent Ivo. 757,725, dated April 19, 1904.

Application tiled February 1, 1904.

To a/ZZ whom t perry concern:

Be it known that I, Gnonen L. CoRooRAN, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Shuttle-Actuating Mechanism for Sewing- Machines, of which the following is a full,

clear, and exact description, such as will enable others skilled in the art to which it apro pertains to make and use the same, referenceA being had to the accompanying drawings, forming part of this specication, in which- Figure 1 is a side view of a sewing-machine with the present invention applied, this view I5 being vpartly in section and certain of the structure being indicated by dotted lines,while certain other of the parts are broken away.

Fig. 2 is an elevation at right angles to Eig.

1, certain of the parts being shown in section 2o and certain of the parts being broken away. Fig. Sis a detail elevation, partly in section, illustrating a portion of the frame.V Fig. L1 is a rear face viev7 of the clutclnand Fig. 5 is a front face view of the same.

This invention relates to improvements in shuttle-actuating mechanism for sewing-machines.

My object is to provide a simple and efiicient mechanism for intermittently rotating the shuttle, the use of gears or pinionsbeing dispensed with between what lI shall term the shuttle-driving shaft and the mechanism for vdriving said shaft, whereby the connections for driving said shaft are simplified and smooth 3 5 and even movement of said connections is insured. Y

To these ends and also to improve generally upon mechanisms of the character indicated theinvention consists'in the various 40 matters hereinafter described and claimed.

Referring now more p articularly to the drawings, A represents the framework or standard of the sewing-machine.

B indicates the main shaft, which receives its motion in any appropriate manner.

C is the work-table. H is the needle supported upon the needlebar 56, and I is the shuttle. It will of course Serial No. 191,574. (No model.)

be understood that the needle is properly' driven from the main shaft of the machine; but as the driving connections for the needle form no part of the present invention and.

shaft 97, the standard 121 forming one of the supports' for this shaft, and said shaft extending longitudinally of the frame A. A short shaft S-L'Suitably supported, carries the shuttie-driving plate or shuttledriver 115, by means of which the shuttle is driven in a wellunderstood manner, and a gear 118 is fixed upon said shaft 84 to rotate therewithv A gear 117 fixed upon the shuttle-driving shaft 97, drives the said gear 118 through an intermediate gear 119, so that upon rotary movement of the shaft 97 the shuttle I will be rotated in a manner which will be clearly apparent. In the present case the gearing between the shaft 97 and the shaft 84 is such vthat the shuttle makes a complete revolution for each quarter of a revolution of the shaft 97.

At what may be termed its "rear 7V end the shaft 97 has a squared or other non-circular portion 120, upon which is slidably mounted a clutch-sleeve 125, said clutch-sleeve being non-rotatable about said shaft. This sleeve is provided with a peripheral groove 126 and has in its rear face suitable openings 128,

adapted to receive a locking-pin 129, projecting from a suitable portion of the main frame or standard. The forward face of the clutchsleeve is provided with a locking-pin 130, adapted to enter suitable openings in the oscillatory driving member mounted upon the shaft 97 between the standard 121 and the squared end 120 of the shaft, said driving member to be more fully hereinafter described. Hung from the shaft 30 isa lever 133, which is rocked through the instrumentality of the cam-roll 135 upon said lever and entering the before-mentioned cam-.groove 136 in the face of the cam-block 5. Mounted upon the stud 136a is a second lever 137, this second lever being provided at its lower end with a fork 138, whose arms are received in the before-mentioned peripheral groove 126 in the clutchsleeve 125. A cam-roll 139 upon said lever 137 enters the peripheral camgroove 140 of the cam-block 5, so that said lever 137 is rocked during the rotation of the cam-block. Of course the rocking of the lever 137 serves to shift the clutch-sleeve 125, so that this sleeve will in one position be through its pin 130 in engagement with the driving member, (to be more fully hereinafter described,) mounted upon the shaft 97, and will in its opposite position be out of engagement with the said driving member and will have the locking-pin 129 in one of its openings 128, whereby the said clutch-sleeve and the shaft 97 will be locked against rotary movement. A shuttle-actuating mechanism similar to that heretofore described is old; but in the old construction the driving member, loosely mounted upon the shaft 97, has been a pinion in mesh with a rack, said rack being oscillated by means of the lever 133. In the present construction the driving member 225, loosely mounted upon the shaft 97 between the standard 121 and the squared end 120 of the said shaft, is a crank-disk having in its rear face the openings 226, adapted to receive the before-mentioned locking-pin 130, and a crankarm 227 upon said disk is in direct connection with the lower end of the lever 133, as by means of a wrist-pin 228 upon said lever entering an elongated slot 229 in said crank-arm, whereby the rocking lever 133 oscillates said crank-disk 225. Thus in the present construction the use of the oscillatory rack heretofore employed is wholly dispensed with, the oscillatory crank-disk being in direct connection with the said lever 133. Furthermore, the use of intermeshing gearing between said lever 133 and the shaft 97 is wholly dispensed with, the crank-disk 225 with its direct connection to the lever 133 being employed instead of such intermeshing gearing, whereby smooth and even operationis insured and all danger of rattling incident to intermeshin g gear-teeth is obviated.

The operation of the present mechanism will be readily understood. At a proper point in the rotation of the cam-block 5 the lever 137 throws the clutch-sleeve 125 into locking engagement with the oscillatory crank-disk ,225, and the continued rotation of the camblock 5 then rocks the lever 133,whereby the crank-disk 225 is rocked in what may be termed a forward direction and the shuttle-driving shaft'97 is driven through a quarter of a revolution, the shuttle I being through the gears 117, 118, and 119 driven through'a complete revolution. The continued rotation of the cam-block 5 then serves to throw the clutch-sleeve 135 out of locking engagement with the oscillatory crank-disk 225, said clutchsleeve becoming locked upon the pin 129, and then the rotation of the cam-block 5 serves to rock the lever 133 and the crank-disk 225 backwardly, said crank-disk in this backward movement rocking idly upon the locked shaft 97.

I am aware that minor changes in the construction, arrangement, and combination of the several parts of my mechanism can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is-

1. In a sewing-machine, a shuttle-actuating mechanism for intermittently operating the shuttle, said mechanism comprising a shuttle- Vdriver, a shuttle-driving shaft, operative connection between said shaft and said shuttledriver, an oscillatory crank loosely mounted upon said shuttle-driving shaft, a rocking lever connected to said crank to oscillate the latter, a main shaft, driving -connection between said main shaft and said lever for rocking the latter, and means for alternately operatively connecting said crank to and disconnecting said crank from said shuttle-driving shaft; substantially as described.

2. In a sewing-machine, a shuttle-actuating mechanism for intermittently operating the shuttle, said mechanism comprising a main shaft, a cam-block driven thereby, a shuttledriver, a shuttle-driving shaft, operative connection between said shuttle-driver and said shuttle-driving shaft, an oscillatory crank loosely mounted upon said shuttle-driving shaft, a rocking lever connected to said crank t'o oscillate the latter, a clutch member cooperating with sad crank and slidably mounted upon said shuttle-driving shaft but nonrotatable about said shaft, a second rocking lever engaging said clutch member, and driving connection for said levers between each IOO IIO

of said levers and said cam-block; substantially as described.

In testimony whereof I hereunto affix my signature, in the presence of two witnesses, this 28th day of January, 1904.-

GEORGE L. CORCORAN.

Witnesses:

GALEs P. MOORE, GEORGE BAKEWELL. 

